Tennis is often described as a gladiatorial sport, with its one-on-one battles played out on the grandest stages. Yet beneath the competitive fire, the sport has also seen deep friendships bloom—sometimes even between rivals.

It was an emotional night in Buenos Aires on Sunday as Novak Djokovic helped Juan Martin del Potro say goodbye to his tennis career. The Argentine tennis star beat the 24-time Major winner in his final match and both men immediately broke down in tears.

Juan Martin del Potro bid farewell after beating Novak Djokovic 6-4, 7-5 in an emotional exhibition match in front of his home crowd in Buenos Aires, Argentina on Sunday.

Juan Martin del Potro ended his career on Sunday. The 2009 US Open champion played an exhibition match against his great friend Novak Djokovic in Buenos Aires. They enjoyed every minute on the court,

Novak Djokovic left Juan Martin del Potro and the Argentine fans delighted as he granted the former No. 3’s unusual request during an exhibition match. Del Potro said farewell to tennis with one last outing against Djokovic in Buenos Aires, in a contest dubbed ‘The Last Challenge’.

Novak Djokovic and Roger Federer both paid tribute to Juan Martin del Potro at an emotional farewell match in Buenos Aires.

Juan Martin del Potro left fans in awe after clinching the El Ultimo Desafio win in Beuno Aires against Novak Djokovic.

With a spectacular show featuring Gabriela Sabatini and Gisela Dulko, Juan Martin Del Potro defeats Novak Djokovic 6-4, 7-5 in his farewell match. A tennis legend retires and all that remains is to thank him for so many moments,

"Both Del Potro and Djokovic perfectly embody the values that have guided our company since its inception: effort, excellence, resilience, and passion. Both are elite world tennis players who have excelled on all surfaces,

Here are 5 wholesome moments that explain why Juan Martin del Potro picked Novak Djokovic as his opponent for the “El Ultimo Desafio”.